During the Sept. 15 showdown, fans at CenturyLink Field -- the loudest stadium in the NFL -- might break the Guinness World Record for "loudest crowd roar at a sports stadium."

"Volume 12," a Seahawks fan group not officially associated with the team, announced on its Facebook page that Guinness accepted the application to give the "12th Man" the opportunity to break the record.

The current record in this category of 131.76 decibels, according to SeattlePI.com, was set at the Ali Sami Yen Sport Complex Turk Telekom Arena on March 18, 2011, in Istanbul, Turkey, by fans of Turkey's Galatasaray S.K. club. (That is the other kind of football, for those not familiar.)

The Seahawks' official website documents the highest decible level at CenturyLink at 112. However, the 60,000-seat stadium holds 7,000 more fans than the current record holder.

Considering how loud Seahawks fans are without a record on the line, we'd be silly to bet against them.